INSECT PESTS AND THEIR CONTROL 991 



this is the most serious pest of squash vines. The larvae bore into the 

 vines, causing them to rot and break off easily. 



Treatment. — Rake up and destroy vines as soon as possible in the fall. 

 Plow deeply in the spring. Rotate crops; plant early squashes among 

 other vines as a trap crop. 

 Bur. Ent. Cir. 38. 



The Striped Cucumber Beetle (Diabrotica vittata, Fab.). — A black- 

 and-yellow striped beetle two-fifths of an inch long, injuring cucumbers, 

 squashes and melons by feeding on the young plants as they come up. 



Treatment. — Cover the hills of young plants with nets to protect them 

 from beetles. Dust 

 heavily with air- 

 slaked lime and 

 tobacco dust while 

 the dew is on. Spray 

 the plants with ar- 

 senate of lead 3 to 5 

 pounds to 50 gallons. 

 Bur. Ent. Cir. 31. 



Sugar Beet Web 

 Worm (Loxostege 

 sticticalis, Linn.). — 

 This insect defoliates 

 beets and webs them 

 together at times, Apple Maggot, or Railroad Worm 



causing notable in- (Rhagoletis pomonella). 1 



jury. It also feeds A — Adult. B — Larva or maggot. C — Funnel of ceph- 



on onions rabhap-p alic s P iracle - D— Puparium. E— Portion of apple show- 

 on 01 ™^ cabbage i ng injury by maggots. A, B, C-Enlarged. D-Stillmore 

 alfalfa, pigweed and enlarged. E— Reduced, 

 careless weed. 



Treatment. — Plow the infested land in late fall or winter. Spray or 

 dust the plants with arsenicals. 

 Bur. Ent. Bull. 109, Pt. 6. 



FRUIT INSECTS 

 Apple Maggot, or Railroad Worm {Rhagoletis pomonella, Walsh.). — The 

 larva of a two-winged fly. It infests summer and early fall apples and 

 occasionally winter apples, tunneling through the flesh of fruit and causing 

 it to fall. 



Treatment. — Spray the trees during the first week in July with arsenate 

 of lead, 4 pounds to 100 gallons. Pick up infested fruit every two or three 

 days and feed it to hogs or bury it deeply. 

 Bur. Ent. Cir. 101. 



Apple Tree Tent Caterpillar (Malacosoma Americana, Fab.).— The 



iBur. Ent. Cir. 101. 



